A couple of days ago I started having neofetch hang on GPU detection, but today it hanged completely on me. I checked in System Monitor and it had lspci -mm process in Uninterruptible state. After a quick search, I found that the likely culprit is some kernel driver not responding to a system call indefinitely. I was using linux-zen at the time. So, I installed linux-lts, uninstalled linux-zen, updated GRUB and rebooted [reboot hanged, so I had to resort to SysRq+REISUB]. After the reboot, the problem remained, despite the kernel change from ZEN to LTS. I also searched both Artix and Arch forums, but nobody reported a similar issue.
Open a terminal and issue dmesg -wHT. In another terminal (or tab) run neofetch or lspci -nn and see if dmesg shows anything relevant.
Rund dmesg in first tab, then neofetch in the second. Waited for 10 minutes. There was no new output from dmesg. Last 2 lines from dmesg, just in case:
[Sat Oct 16 10:59:39 2021] elogind[768]: Lid opened.
[Sat Oct 16 11:00:09 2021] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Output of uname -a, just in case:
Linux lenovo-g570 5.10.72-1-lts #1 SMP Sun, 10 Oct 2021 09:57:11 +0000 x86_64 GNU/Linux
I'm thinking about what other package could cause besides the kernel, since problem is present w/ both ZEN and LTS.
By going through the backlog of dmesg ouput, I found this:
[Fri Oct 15 16:35:47 2021] elogind[768]: New session c1 of user lightdm.
[Fri Oct 15 16:35:52 2021] elogind[768]: Removed session c1.
[Fri Oct 15 16:35:52 2021] elogind[768]: New session 1 of user alexander.
[Fri Oct 15 16:36:22 2021] [TTM] Buffer eviction failed
[Fri Oct 15 16:39:27 2021] INFO: task kworker/0:4:142 blocked for more than 122 seconds.
[Fri Oct 15 16:39:27 2021] Not tainted 5.10.72-1-lts #1
[Fri Oct 15 16:39:27 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:39:27 2021] task:kworker/0:4 state:D stack: 0 pid: 142 ppid: 2 flags:0x00004000
[Fri Oct 15 16:39:27 2021] Workqueue: pm pm_runtime_work
[Fri Oct 15 16:39:27 2021] Call Trace:
[Fri Oct 15 16:39:27 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:39:27 2021] schedule+0x46/0xb0
[Fri Oct 15 16:39:27 2021] schedule_timeout+0x103/0x140
[Fri Oct 15 16:39:27 2021] radeon_fence_wait_seq_timeout+0x293/0x350 [radeon]
[Fri Oct 15 16:39:27 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:39:27 2021] radeon_fence_wait_empty+0x7e/0xa0 [radeon]
[Fri Oct 15 16:39:27 2021] radeon_suspend_kms+0x1e9/0x310 [radeon]
[Fri Oct 15 16:39:27 2021] radeon_pmops_runtime_suspend+0x43/0xb0 [radeon]
[Fri Oct 15 16:39:27 2021] pci_pm_runtime_suspend+0x5e/0x170
[Fri Oct 15 16:39:27 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:39:27 2021] vga_switcheroo_runtime_suspend+0x22/0xb0
[Fri Oct 15 16:39:27 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:39:27 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:39:27 2021] __rpm_callback+0x81/0x140
[Fri Oct 15 16:39:27 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:39:27 2021] rpm_callback+0x1f/0x70
[Fri Oct 15 16:39:27 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:39:27 2021] rpm_suspend+0x174/0x720
[Fri Oct 15 16:39:27 2021] pm_runtime_work+0x8e/0x90
[Fri Oct 15 16:39:27 2021] process_one_work+0x1b6/0x350
[Fri Oct 15 16:39:27 2021] worker_thread+0x53/0x3e0
[Fri Oct 15 16:39:27 2021] ? process_one_work+0x350/0x350
[Fri Oct 15 16:39:27 2021] kthread+0x11b/0x140
[Fri Oct 15 16:39:27 2021] ? kthread_associate_blkcg+0xa0/0xa0
[Fri Oct 15 16:39:27 2021] ret_from_fork+0x22/0x30
[Fri Oct 15 16:39:29 2021] wl: loading out-of-tree module taints kernel.
[Fri Oct 15 16:39:29 2021] wl: module license 'MIXED/Proprietary' taints kernel.
[Fri Oct 15 16:39:29 2021] Disabling lock debugging due to kernel taint
[Fri Oct 15 16:39:29 2021] wl: module verification failed: signature and/or required key missing - tainting kernel
[Fri Oct 15 16:39:29 2021] wlan0: Broadcom BCM4727 802.11 Hybrid Wireless Controller 6.30.223.271 (r587334)
[Fri Oct 15 16:39:44 2021] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[Fri Oct 15 16:41:30 2021] INFO: task kworker/0:4:142 blocked for more than 245 seconds.
[Fri Oct 15 16:41:30 2021] Tainted: P OE 5.10.72-1-lts #1
[Fri Oct 15 16:41:30 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:41:30 2021] task:kworker/0:4 state:D stack: 0 pid: 142 ppid: 2 flags:0x00004000
[Fri Oct 15 16:41:30 2021] Workqueue: pm pm_runtime_work
[Fri Oct 15 16:41:30 2021] Call Trace:
[Fri Oct 15 16:41:30 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:41:30 2021] schedule+0x46/0xb0
[Fri Oct 15 16:41:30 2021] schedule_timeout+0x103/0x140
[Fri Oct 15 16:41:30 2021] radeon_fence_wait_seq_timeout+0x293/0x350 [radeon]
[Fri Oct 15 16:41:30 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:41:30 2021] radeon_fence_wait_empty+0x7e/0xa0 [radeon]
[Fri Oct 15 16:41:30 2021] radeon_suspend_kms+0x1e9/0x310 [radeon]
[Fri Oct 15 16:41:30 2021] radeon_pmops_runtime_suspend+0x43/0xb0 [radeon]
[Fri Oct 15 16:41:30 2021] pci_pm_runtime_suspend+0x5e/0x170
[Fri Oct 15 16:41:30 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:41:30 2021] vga_switcheroo_runtime_suspend+0x22/0xb0
[Fri Oct 15 16:41:30 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:41:30 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:41:30 2021] __rpm_callback+0x81/0x140
[Fri Oct 15 16:41:30 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:41:30 2021] rpm_callback+0x1f/0x70
[Fri Oct 15 16:41:30 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:41:30 2021] rpm_suspend+0x174/0x720
[Fri Oct 15 16:41:30 2021] pm_runtime_work+0x8e/0x90
[Fri Oct 15 16:41:30 2021] process_one_work+0x1b6/0x350
[Fri Oct 15 16:41:30 2021] worker_thread+0x53/0x3e0
[Fri Oct 15 16:41:30 2021] ? process_one_work+0x350/0x350
[Fri Oct 15 16:41:30 2021] kthread+0x11b/0x140
[Fri Oct 15 16:41:30 2021] ? kthread_associate_blkcg+0xa0/0xa0
[Fri Oct 15 16:41:30 2021] ret_from_fork+0x22/0x30
[Fri Oct 15 16:43:33 2021] INFO: task kworker/0:4:142 blocked for more than 368 seconds.
[Fri Oct 15 16:43:33 2021] Tainted: P OE 5.10.72-1-lts #1
[Fri Oct 15 16:43:33 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:43:33 2021] task:kworker/0:4 state:D stack: 0 pid: 142 ppid: 2 flags:0x00004000
[Fri Oct 15 16:43:33 2021] Workqueue: pm pm_runtime_work
[Fri Oct 15 16:43:33 2021] Call Trace:
[Fri Oct 15 16:43:33 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:43:33 2021] schedule+0x46/0xb0
[Fri Oct 15 16:43:33 2021] schedule_timeout+0x103/0x140
[Fri Oct 15 16:43:33 2021] radeon_fence_wait_seq_timeout+0x293/0x350 [radeon]
[Fri Oct 15 16:43:33 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:43:33 2021] radeon_fence_wait_empty+0x7e/0xa0 [radeon]
[Fri Oct 15 16:43:33 2021] radeon_suspend_kms+0x1e9/0x310 [radeon]
[Fri Oct 15 16:43:33 2021] radeon_pmops_runtime_suspend+0x43/0xb0 [radeon]
[Fri Oct 15 16:43:33 2021] pci_pm_runtime_suspend+0x5e/0x170
[Fri Oct 15 16:43:33 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:43:33 2021] vga_switcheroo_runtime_suspend+0x22/0xb0
[Fri Oct 15 16:43:33 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:43:33 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:43:33 2021] __rpm_callback+0x81/0x140
[Fri Oct 15 16:43:33 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:43:33 2021] rpm_callback+0x1f/0x70
[Fri Oct 15 16:43:33 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:43:33 2021] rpm_suspend+0x174/0x720
[Fri Oct 15 16:43:33 2021] pm_runtime_work+0x8e/0x90
[Fri Oct 15 16:43:33 2021] process_one_work+0x1b6/0x350
[Fri Oct 15 16:43:33 2021] worker_thread+0x53/0x3e0
[Fri Oct 15 16:43:33 2021] ? process_one_work+0x350/0x350
[Fri Oct 15 16:43:33 2021] kthread+0x11b/0x140
[Fri Oct 15 16:43:33 2021] ? kthread_associate_blkcg+0xa0/0xa0
[Fri Oct 15 16:43:33 2021] ret_from_fork+0x22/0x30
[Fri Oct 15 16:44:18 2021] ptrace attach of "lspci -mm"[8868] was attempted by "cat /proc/8868/syscall"[9527]
[Fri Oct 15 16:45:36 2021] INFO: task kworker/0:4:142 blocked for more than 491 seconds.
[Fri Oct 15 16:45:36 2021] Tainted: P OE 5.10.72-1-lts #1
[Fri Oct 15 16:45:36 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:45:36 2021] task:kworker/0:4 state:D stack: 0 pid: 142 ppid: 2 flags:0x00004000
[Fri Oct 15 16:45:36 2021] Workqueue: pm pm_runtime_work
[Fri Oct 15 16:45:36 2021] Call Trace:
[Fri Oct 15 16:45:36 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:45:36 2021] schedule+0x46/0xb0
[Fri Oct 15 16:45:36 2021] schedule_timeout+0x103/0x140
[Fri Oct 15 16:45:36 2021] radeon_fence_wait_seq_timeout+0x293/0x350 [radeon]
[Fri Oct 15 16:45:36 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:45:36 2021] radeon_fence_wait_empty+0x7e/0xa0 [radeon]
[Fri Oct 15 16:45:36 2021] radeon_suspend_kms+0x1e9/0x310 [radeon]
[Fri Oct 15 16:45:36 2021] radeon_pmops_runtime_suspend+0x43/0xb0 [radeon]
[Fri Oct 15 16:45:36 2021] pci_pm_runtime_suspend+0x5e/0x170
[Fri Oct 15 16:45:36 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:45:36 2021] vga_switcheroo_runtime_suspend+0x22/0xb0
[Fri Oct 15 16:45:36 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:45:36 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:45:36 2021] __rpm_callback+0x81/0x140
[Fri Oct 15 16:45:36 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:45:36 2021] rpm_callback+0x1f/0x70
[Fri Oct 15 16:45:36 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:45:36 2021] rpm_suspend+0x174/0x720
[Fri Oct 15 16:45:36 2021] pm_runtime_work+0x8e/0x90
[Fri Oct 15 16:45:36 2021] process_one_work+0x1b6/0x350
[Fri Oct 15 16:45:36 2021] worker_thread+0x53/0x3e0
[Fri Oct 15 16:45:36 2021] ? process_one_work+0x350/0x350
[Fri Oct 15 16:45:36 2021] kthread+0x11b/0x140
[Fri Oct 15 16:45:36 2021] ? kthread_associate_blkcg+0xa0/0xa0
[Fri Oct 15 16:45:36 2021] ret_from_fork+0x22/0x30
[Fri Oct 15 16:45:36 2021] INFO: task lspci:8868 blocked for more than 122 seconds.
[Fri Oct 15 16:45:36 2021] Tainted: P OE 5.10.72-1-lts #1
[Fri Oct 15 16:45:36 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:45:36 2021] task:lspci state:D stack: 0 pid: 8868 ppid: 8867 flags:0x00000000
[Fri Oct 15 16:45:36 2021] Call Trace:
[Fri Oct 15 16:45:36 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:45:36 2021] schedule+0x46/0xb0
[Fri Oct 15 16:45:36 2021] __pm_runtime_barrier+0xd6/0x1a0
[Fri Oct 15 16:45:36 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:45:36 2021] pm_runtime_barrier+0x48/0x90
[Fri Oct 15 16:45:36 2021] pci_config_pm_runtime_get+0x36/0x50
[Fri Oct 15 16:45:36 2021] pci_read_config+0xac/0x270
[Fri Oct 15 16:45:36 2021] ? kernfs_fop_read_iter+0x11b/0x1a0
[Fri Oct 15 16:45:36 2021] kernfs_fop_read_iter+0xa6/0x1a0
[Fri Oct 15 16:45:36 2021] new_sync_read+0x152/0x1e0
[Fri Oct 15 16:45:36 2021] vfs_read+0x147/0x1a0
[Fri Oct 15 16:45:36 2021] __x64_sys_pread64+0x8c/0xc0
[Fri Oct 15 16:45:36 2021] do_syscall_64+0x33/0x40
[Fri Oct 15 16:45:36 2021] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Fri Oct 15 16:45:36 2021] RIP: 0033:0x7f343f0ff27a
[Fri Oct 15 16:45:36 2021] RSP: 002b:00007fffd4490a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
[Fri Oct 15 16:45:36 2021] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f343f0ff27a
[Fri Oct 15 16:45:36 2021] RDX: 0000000000000040 RSI: 0000556360a23c00 RDI: 0000000000000003
[Fri Oct 15 16:45:36 2021] RBP: 0000000000000040 R08: 00007f343f197040 R09: 00007fffd4490400
[Fri Oct 15 16:45:36 2021] R10: 0000000000000000 R11: 0000000000000246 R12: 0000556360a2bbf0
[Fri Oct 15 16:45:36 2021] R13: 0000556360a23c00 R14: 0000000000000000 R15: 0000000000000000
[Fri Oct 15 16:47:39 2021] INFO: task kworker/0:4:142 blocked for more than 614 seconds.
[Fri Oct 15 16:47:39 2021] Tainted: P OE 5.10.72-1-lts #1
[Fri Oct 15 16:47:39 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:47:39 2021] task:kworker/0:4 state:D stack: 0 pid: 142 ppid: 2 flags:0x00004000
[Fri Oct 15 16:47:39 2021] Workqueue: pm pm_runtime_work
[Fri Oct 15 16:47:39 2021] Call Trace:
[Fri Oct 15 16:47:39 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:47:39 2021] schedule+0x46/0xb0
[Fri Oct 15 16:47:39 2021] schedule_timeout+0x103/0x140
[Fri Oct 15 16:47:39 2021] radeon_fence_wait_seq_timeout+0x293/0x350 [radeon]
[Fri Oct 15 16:47:39 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:47:39 2021] radeon_fence_wait_empty+0x7e/0xa0 [radeon]
[Fri Oct 15 16:47:39 2021] radeon_suspend_kms+0x1e9/0x310 [radeon]
[Fri Oct 15 16:47:39 2021] radeon_pmops_runtime_suspend+0x43/0xb0 [radeon]
[Fri Oct 15 16:47:39 2021] pci_pm_runtime_suspend+0x5e/0x170
[Fri Oct 15 16:47:39 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:47:39 2021] vga_switcheroo_runtime_suspend+0x22/0xb0
[Fri Oct 15 16:47:39 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:47:39 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:47:39 2021] __rpm_callback+0x81/0x140
[Fri Oct 15 16:47:39 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:47:39 2021] rpm_callback+0x1f/0x70
[Fri Oct 15 16:47:39 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:47:39 2021] rpm_suspend+0x174/0x720
[Fri Oct 15 16:47:39 2021] pm_runtime_work+0x8e/0x90
[Fri Oct 15 16:47:39 2021] process_one_work+0x1b6/0x350
[Fri Oct 15 16:47:39 2021] worker_thread+0x53/0x3e0
[Fri Oct 15 16:47:39 2021] ? process_one_work+0x350/0x350
[Fri Oct 15 16:47:39 2021] kthread+0x11b/0x140
[Fri Oct 15 16:47:39 2021] ? kthread_associate_blkcg+0xa0/0xa0
[Fri Oct 15 16:47:39 2021] ret_from_fork+0x22/0x30
[Fri Oct 15 16:47:39 2021] INFO: task lspci:8868 blocked for more than 245 seconds.
[Fri Oct 15 16:47:39 2021] Tainted: P OE 5.10.72-1-lts #1
[Fri Oct 15 16:47:39 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:47:39 2021] task:lspci state:D stack: 0 pid: 8868 ppid: 8867 flags:0x00000000
[Fri Oct 15 16:47:39 2021] Call Trace:
[Fri Oct 15 16:47:39 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:47:39 2021] schedule+0x46/0xb0
[Fri Oct 15 16:47:39 2021] __pm_runtime_barrier+0xd6/0x1a0
[Fri Oct 15 16:47:39 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:47:39 2021] pm_runtime_barrier+0x48/0x90
[Fri Oct 15 16:47:39 2021] pci_config_pm_runtime_get+0x36/0x50
[Fri Oct 15 16:47:39 2021] pci_read_config+0xac/0x270
[Fri Oct 15 16:47:39 2021] ? kernfs_fop_read_iter+0x11b/0x1a0
[Fri Oct 15 16:47:39 2021] kernfs_fop_read_iter+0xa6/0x1a0
[Fri Oct 15 16:47:39 2021] new_sync_read+0x152/0x1e0
[Fri Oct 15 16:47:39 2021] vfs_read+0x147/0x1a0
[Fri Oct 15 16:47:39 2021] __x64_sys_pread64+0x8c/0xc0
[Fri Oct 15 16:47:39 2021] do_syscall_64+0x33/0x40
[Fri Oct 15 16:47:39 2021] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Fri Oct 15 16:47:39 2021] RIP: 0033:0x7f343f0ff27a
[Fri Oct 15 16:47:39 2021] RSP: 002b:00007fffd4490a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
[Fri Oct 15 16:47:39 2021] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f343f0ff27a
[Fri Oct 15 16:47:39 2021] RDX: 0000000000000040 RSI: 0000556360a23c00 RDI: 0000000000000003
[Fri Oct 15 16:47:39 2021] RBP: 0000000000000040 R08: 00007f343f197040 R09: 00007fffd4490400
[Fri Oct 15 16:47:39 2021] R10: 0000000000000000 R11: 0000000000000246 R12: 0000556360a2bbf0
[Fri Oct 15 16:47:39 2021] R13: 0000556360a23c00 R14: 0000000000000000 R15: 0000000000000000
[Fri Oct 15 16:49:42 2021] INFO: task kworker/0:4:142 blocked for more than 737 seconds.
[Fri Oct 15 16:49:42 2021] Tainted: P OE 5.10.72-1-lts #1
[Fri Oct 15 16:49:42 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:49:42 2021] task:kworker/0:4 state:D stack: 0 pid: 142 ppid: 2 flags:0x00004000
[Fri Oct 15 16:49:42 2021] Workqueue: pm pm_runtime_work
[Fri Oct 15 16:49:42 2021] Call Trace:
[Fri Oct 15 16:49:42 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:49:42 2021] schedule+0x46/0xb0
[Fri Oct 15 16:49:42 2021] schedule_timeout+0x103/0x140
[Fri Oct 15 16:49:42 2021] radeon_fence_wait_seq_timeout+0x293/0x350 [radeon]
[Fri Oct 15 16:49:42 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:49:42 2021] radeon_fence_wait_empty+0x7e/0xa0 [radeon]
[Fri Oct 15 16:49:42 2021] radeon_suspend_kms+0x1e9/0x310 [radeon]
[Fri Oct 15 16:49:42 2021] radeon_pmops_runtime_suspend+0x43/0xb0 [radeon]
[Fri Oct 15 16:49:42 2021] pci_pm_runtime_suspend+0x5e/0x170
[Fri Oct 15 16:49:42 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:49:42 2021] vga_switcheroo_runtime_suspend+0x22/0xb0
[Fri Oct 15 16:49:42 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:49:42 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:49:42 2021] __rpm_callback+0x81/0x140
[Fri Oct 15 16:49:42 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:49:42 2021] rpm_callback+0x1f/0x70
[Fri Oct 15 16:49:42 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:49:42 2021] rpm_suspend+0x174/0x720
[Fri Oct 15 16:49:42 2021] pm_runtime_work+0x8e/0x90
[Fri Oct 15 16:49:42 2021] process_one_work+0x1b6/0x350
[Fri Oct 15 16:49:42 2021] worker_thread+0x53/0x3e0
[Fri Oct 15 16:49:42 2021] ? process_one_work+0x350/0x350
[Fri Oct 15 16:49:42 2021] kthread+0x11b/0x140
[Fri Oct 15 16:49:42 2021] ? kthread_associate_blkcg+0xa0/0xa0
[Fri Oct 15 16:49:42 2021] ret_from_fork+0x22/0x30
[Fri Oct 15 16:49:42 2021] INFO: task lspci:8868 blocked for more than 368 seconds.
[Fri Oct 15 16:49:42 2021] Tainted: P OE 5.10.72-1-lts #1
[Fri Oct 15 16:49:42 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:49:42 2021] task:lspci state:D stack: 0 pid: 8868 ppid: 8867 flags:0x00000000
[Fri Oct 15 16:49:42 2021] Call Trace:
[Fri Oct 15 16:49:42 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:49:42 2021] schedule+0x46/0xb0
[Fri Oct 15 16:49:42 2021] __pm_runtime_barrier+0xd6/0x1a0
[Fri Oct 15 16:49:42 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:49:42 2021] pm_runtime_barrier+0x48/0x90
[Fri Oct 15 16:49:42 2021] pci_config_pm_runtime_get+0x36/0x50
[Fri Oct 15 16:49:42 2021] pci_read_config+0xac/0x270
[Fri Oct 15 16:49:42 2021] ? kernfs_fop_read_iter+0x11b/0x1a0
[Fri Oct 15 16:49:42 2021] kernfs_fop_read_iter+0xa6/0x1a0
[Fri Oct 15 16:49:42 2021] new_sync_read+0x152/0x1e0
[Fri Oct 15 16:49:42 2021] vfs_read+0x147/0x1a0
[Fri Oct 15 16:49:42 2021] __x64_sys_pread64+0x8c/0xc0
[Fri Oct 15 16:49:42 2021] do_syscall_64+0x33/0x40
[Fri Oct 15 16:49:42 2021] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Fri Oct 15 16:49:42 2021] RIP: 0033:0x7f343f0ff27a
[Fri Oct 15 16:49:42 2021] RSP: 002b:00007fffd4490a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
[Fri Oct 15 16:49:42 2021] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f343f0ff27a
[Fri Oct 15 16:49:42 2021] RDX: 0000000000000040 RSI: 0000556360a23c00 RDI: 0000000000000003
[Fri Oct 15 16:49:42 2021] RBP: 0000000000000040 R08: 00007f343f197040 R09: 00007fffd4490400
[Fri Oct 15 16:49:42 2021] R10: 0000000000000000 R11: 0000000000000246 R12: 0000556360a2bbf0
[Fri Oct 15 16:49:42 2021] R13: 0000556360a23c00 R14: 0000000000000000 R15: 0000000000000000
[Fri Oct 15 16:50:57 2021] Adding 4194300k swap on /home/swapfile. Priority:-2 extents:178 across:180440384k SSDscFS
[Fri Oct 15 16:51:45 2021] INFO: task kworker/0:4:142 blocked for more than 860 seconds.
[Fri Oct 15 16:51:45 2021] Tainted: P OE 5.10.72-1-lts #1
[Fri Oct 15 16:51:45 2021] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Fri Oct 15 16:51:45 2021] task:kworker/0:4 state:D stack: 0 pid: 142 ppid: 2 flags:0x00004000
[Fri Oct 15 16:51:45 2021] Workqueue: pm pm_runtime_work
[Fri Oct 15 16:51:45 2021] Call Trace:
[Fri Oct 15 16:51:45 2021] __schedule+0x295/0x7f0
[Fri Oct 15 16:51:45 2021] schedule+0x46/0xb0
[Fri Oct 15 16:51:45 2021] schedule_timeout+0x103/0x140
[Fri Oct 15 16:51:45 2021] radeon_fence_wait_seq_timeout+0x293/0x350 [radeon]
[Fri Oct 15 16:51:45 2021] ? add_wait_queue_exclusive+0x70/0x70
[Fri Oct 15 16:51:45 2021] radeon_fence_wait_empty+0x7e/0xa0 [radeon]
[Fri Oct 15 16:51:45 2021] radeon_suspend_kms+0x1e9/0x310 [radeon]
[Fri Oct 15 16:51:45 2021] radeon_pmops_runtime_suspend+0x43/0xb0 [radeon]
[Fri Oct 15 16:51:45 2021] pci_pm_runtime_suspend+0x5e/0x170
[Fri Oct 15 16:51:45 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:51:45 2021] vga_switcheroo_runtime_suspend+0x22/0xb0
[Fri Oct 15 16:51:45 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:51:45 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:51:45 2021] __rpm_callback+0x81/0x140
[Fri Oct 15 16:51:45 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:51:45 2021] rpm_callback+0x1f/0x70
[Fri Oct 15 16:51:45 2021] ? vga_switcheroo_runtime_resume+0x60/0x60
[Fri Oct 15 16:51:45 2021] rpm_suspend+0x174/0x720
[Fri Oct 15 16:51:45 2021] pm_runtime_work+0x8e/0x90
[Fri Oct 15 16:51:45 2021] process_one_work+0x1b6/0x350
[Fri Oct 15 16:51:45 2021] worker_thread+0x53/0x3e0
[Fri Oct 15 16:51:45 2021] ? process_one_work+0x350/0x350
[Fri Oct 15 16:51:45 2021] kthread+0x11b/0x140
[Fri Oct 15 16:51:45 2021] ? kthread_associate_blkcg+0xa0/0xa0
[Fri Oct 15 16:51:45 2021] ret_from_fork+0x22/0x30
Now, taint comes from broadcom-wl-dkms, which I had to install after switching to LTS kernel, since brcmsmac module is causing kernel panics on LTS, but I could repeat after switching to ZEN and uninstalling proprietary module.
By the looks of it, radeon module is the culprit. I'll blacklist it and reboot, see if that solves the issue.
Blacklisting radeon module solved the issue.